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98eccd94a1
We could allocate chunks larger than 4GB, but did our size-accounting in 32-bit values. This could lead to spurious warnings, inaccurate accounting, and, in theory, data loss. Affected: 64-bit platforms. Debug-build (with safemalloc). At least one buffer larger than 4GB. For potential data loss, a re-alloc on such a buffer would be necessary. mysys/my_static.c: Make memory-accounting 64-bit safe. mysys/my_static.h: Make memory-accounting 64-bit safe. Move in struct for better alignment when 64-bit.
74 lines
2.3 KiB
C
74 lines
2.3 KiB
C
/* Copyright (C) 2000 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/*
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Static variables for mysys library. All definied here for easy making of
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a shared library
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*/
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C_MODE_START
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#include <signal.h>
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#define MAX_SIGNALS 10 /* Max signals under a dont-allow */
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#define MIN_KEYBLOCK (min(IO_SIZE,1024))
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#define MAX_KEYBLOCK 8192 /* Max keyblocklength == 8*IO_SIZE */
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#define MAX_BLOCK_TYPES MAX_KEYBLOCK/MIN_KEYBLOCK
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struct st_remember {
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int number;
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sig_handler (*func)(int number);
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};
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/*
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Structure that stores information of a allocated memory block
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The data is at &struct_adr+sizeof(ALIGN_SIZE(sizeof(struct irem)))
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The lspecialvalue is at the previous 4 bytes from this, which may not
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necessarily be in the struct if the struct size isn't aligned at a 8 byte
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boundary.
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*/
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struct st_irem
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{
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struct st_irem *next; /* Linked list of structures */
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struct st_irem *prev; /* Other link */
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char *filename; /* File in which memory was new'ed */
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size_t datasize; /* Size requested */
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uint32 linenum; /* Line number in above file */
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uint32 SpecialValue; /* Underrun marker value */
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};
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extern char NEAR curr_dir[FN_REFLEN],NEAR home_dir_buff[FN_REFLEN];
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extern volatile int _my_signals;
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extern struct st_remember _my_sig_remember[MAX_SIGNALS];
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extern const char *soundex_map;
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extern USED_MEM* my_once_root_block;
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extern uint my_once_extra;
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extern uchar *sf_min_adress,*sf_max_adress;
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extern uint sf_malloc_count;
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extern struct st_irem *sf_malloc_root;
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extern struct st_my_file_info my_file_info_default[MY_NFILE];
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extern ulonglong query_performance_frequency, query_performance_offset;
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#if defined(THREAD) && !defined(__WIN__)
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extern sigset_t my_signals; /* signals blocked by mf_brkhant */
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#endif
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C_MODE_END
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